The QSDC-800-3500-K2-40-N from Qualwave is a Directional Coupler with Frequency 800 to 3500 MHz, Coupling 40±1.5 dB, Directivity 18 dB, Average Power 200 W, Insertion Loss 0.35 dB. Tags: Module with Connectors. More details for QSDC-800-3500-K2-40-N can be seen below.